Mold for making castings



Feb. 19 1924. I1,4-84,%@

J. S. THOMPSQN MOLD FOR MAKING CASTINGS Filed Dec.'28, 1923 Patented Feb. 19, 19241.

JAMES S. THOMPSON, OF PELI-IAIVI, NEW TIDE/K.

MOLD FOR MAKING CASTINGS;

Application filed. December 28, 1923. Serial No. 683,181.

To all whom it may concern.

Be it known that I, JAMES S. THOMPSON,

a citizen of the United States, residing at Pelham, in the county of "Westchester and State of New York, have invented certain new and useful Improvements in Molds for halaking Castings, of which the following is a specification. r This invention relates to permanent molds for making castings, and its object is generally to facilitate opening the mold after the metal has been poured, and to enable this operation to be quickly and easily accomplished.

In making castings in permanent molds, the cope sometimes sticks to the drag and the casting and more or less dificulty is experienced in opening the mold. This may also happen when the casting is provided with projections which may be located where they will add to the difficulty of opening the mold.

I have found in practice that if one end of the cope is kicked up slightly, it will be sufficient to break that sticking which sometimes occurs to a degree which makes it difficult to open the mold, and since it is desirable that the mold should open easily when the time comes for opening it, with 30 the least amount of exertion and without interrupting or delaying the progress of the workman who is opening a floor of molds, it is the object of my invention to provide each mold with means whereby the cope may be given a lick or jar to release it from sticking contact with the drag and casting before the mold is opened.

In the accompanying drawings I have illustrated the invention in a simple form of mold adapted for casting brake shoes, and referring thereto- Fig. 1 is a side elevation showing the mold in full lines in molding position and in broken lines with the cope kicked up slightly with reference to the drag.

Fig. 2 shows the mold in open position.

Fig. 3 is a top plan view of the mold shown in Fig. 1.

Fig. 4- is a detail side elevation of a modification of the means for loosening the cope from the drag.

Referring to the drawings, the mold comprises a drag 5 and a cope 6 having a mold cavity 7. The drag and cope are provided, at one end, with projections 8 and 9 to form the pouring gate 10, and the cope has ,an end 11 to engage the other end 12 of the drag. In F 2 I have shown a brake shoe casting in the drag and, as is well known, such a casting has an attaching lug 13 and end lugs 13 WlllOl'l project from the back of the shoe, and, in the form of mold illustrated; are formed in that part of the mold cavity which is located in the cope, as shown in broken lines in Fig. 1. There is a normal tendency of the mold to stick to the drag of a permanent mold, especially when they are made principally of metal, after the metal hasbeen poured to form the casting, and the provision of project-ions on the casting extending into the cope often tends to increase this sticking as hereinbefore indicated. It is desirable to swing the cope in an are as a simple and convenient method of opening the mold, and it will be readily understood that the labor of doing this will be increased if the cope sticks to the drag and casting. Therefore, I pro vide the drag with side projections 14 and the cope with levers 15 pivotally mounted at 15 on the cope and provided with cams 16 to engage the projections 14. The levers 15 are connected by a cross bar 17 so that they will operate as a unit. The cope is provided with one or more handles 18 at the pouring gate end with stops 19 to hold the levers in operative position.

After the metal has been poured and the casting is made, the cam levers 15 are operated to loosen the cope from the drag and to lift it from the drag in or about the manner indicated in broken lines in Fig. 1. The cam and projection may be made and the cam lever may be operated to lift the cope more or less from the drag as desired. to meet different conditions and in making different castings. By thus loosening the cope from the drag, the cope can be easily swung on an are by moving the handle 18 from the closed position shown in Fig. 1 to the open position shown in Fig. 2, where the cope may be permitted to rest against a suitable support 20. In Figs. 1 and 2 the cam lever is shown arranged to be pulled to the left for loosening the cope from the drag, but it may be made to pull to the right as indicated in Fig. 4, where the lever 21 is provided with a cam 22 arranged in a reverse position to that shown in Fig. 1. A stop 23 is provided to hold the cam lever in upright position.

My invention provides a simple means for overcoming the tendency of the cope in a permanent mold to stick to the drag and casting and thereby to facilitate the operation of opening the mold. Sometimes the cope does not stick at all, and sometimes it sticks more than at other times; therefore, it is highly desirable to provide some simple means which can be operated by workmen opening a floor of molds and which Will avoid the interruptions and loss of time which would occur if a mold sticks. My invention does provide a means for overcoming this tendency of the cope to stick, and it greatly facilitates the operation of opening the mold.

I am aware that changes in the form, con struction and arrangement of parts of my invention may be made to adapt it for different molds and for different castings, and I consider myself entitled to make all such changes as fairly fall Within the scope of the following claims.

I claim:

1. A permanent mold for making castings comprising a drag and a cope, a projection on the drag, and a lever pivotally mounted on the cope to engage said projection for loosening the cope from the drag after the casting has been made.

2. A permanent mold for making castings comprising a drag and a cope, projections on opposite sides of the drag at one end thereof, and levers pivotally mounted on the cope to engage the projections on the drug for loosening the cope from the drag and casting after the casting has been made.

3. A permanent mold for making castings comprising a drag and a cope. a projection on the drag and a cam lever pivotally mounted on the cope and arranged to engage the projection on the drag for loosening the cope from the drag and casting after the casting has been made.

i. A permanent mold for making castings comprising a drag and a cope, projections on oppositesides of the drag adjacent one end thereof, and cam levers pivotally monnted on the'cope above the projections on the drag and adapted to be operated to engage said projections for loosening the cope from the drag and casting after the casting has been made.

JAMES s. THOMPSON. 

